Brake-shoe.



No. 874,668. PATENTED DEC. 24, 1907.

W. E. DE VOE.

BRAKE SHOE. APPLICATION FILED JULY 17, 1907.

2 SHEETS-SHEET 1.

m ,in Illlllllllll I 21% w a e ATTOHNEY W.,E. DE v03.

BRAKE SHOE. 1 APPLICATION FILED JUL.Y17 1907.

A TTOHNEY PATENTED DEC. 24, 1907.

2 SHEETS-SHEET 2.

WlLLIAM s. on VOE, or onioiioo ILLINOIS, .assi'osos TRUSTEE, on use: 633., is.

win 4.1

Bimini s. muons,

engines, such shoes being usually formed 1 with a. Wheel face to Contact with the treel of thewheel, and s curved fis-nge to contest with the llsnge of the Wheel. Shoes of character hsvehere'tolore been constructed Specification of Letters i at-ent.

Application filed July 17, 1907. Serial No. 325-1364.

either entirely of cast iron or of east iion having a. steel plate spplietl st or adjacent to lt has been found, howthe back thereof. ever, that those shoes made entirely oi iron, are structurally Week, 111 that the t view in tsching lug made integral with the booy,

frequently breaks either in service, or in handling, especially when the metal of the in order to shoe is of hard 01' chilling iron, overconie thisinherent defect in asst iron shoes and avoid the danger of the shoe -becoming detached iroinj the brake heed, by

, reason of the breakage of the attaching lug,

- der the book. While this strengthening 01 1 it has become the custom to reinforce the lug With" it strip or strep of steel, the (lllllS oi the steel lug being anchored in the bony metal of the shoe, and inthose instances 5 Where the shoe is provided with a. steel back,

the ends of the lug hsve been anchored onieinforcing of a cast metal lug by a wrought metal or steel lug, materially strengthens the same, yot 1t is open to some ObJUCllOlhs,

l l l l 1 l l 1 i l i in that, the projecting ends Qltlie steel lug embeddetl'in the body of the shoe below the steel back, st times out or injure the need of thewheel alter the shoe has been worn down in service. In other instances, the projectliig ends of the steel lug containing as they do, a small amount olinetsl, are burned 0] E injured by the molten cast iron in which they are en'ibedded, sometimes l'esultil'ig in the formation ol' blow-holes in the body of the shoe.

has been worn down in ser rioe, it sonwtinms he. pens that the ends of the lug PlOjlfCtlilg be ow the steel back, also worn sway,

Again, when the body of the shoe l i l 1 vmetal flowing Wholly .mmliiieil ioi'ni of one em thereby nisterislly l of the lng" nil reins tschetl on y 1' t1 The object (FL in present i vention is to providev on engine driver shoe with o steel heck, when in the lug shell he rustle integmll with the and. reinforcing the east metal lug, O1 rel- OZCGLl by the cost or partially around the some, so that s.lllsngeioi? the lugbeing broken or becoming detached from the shoe. or destroyed 91' injured when the shoe is Worn down in service, will be entirely even some.

With in 0 th r ends in View, the invention consists in oer in novel featuresof construction, es will be hereinafter fullydescribed anti pointed out in the claims.

In the soeon isnyi'ng drawings Figui'e. 1 is eotii e of my improved steel strength eases-sins" t. is

*slale to be leol' H15 3, and ttf 'ljjll ill to the boil of the shoe. Fig 113.315VG1'53 swiion'oi' the shoe lisvii spplieii to the body. Fig. 6 is s $111 new of e. modified form of the heck. Fig. "I perspective View of s of the plate. Fig.

is cross vl w theteoi? s be? the lug struck up; anal 2% is s si iiilsi View showing the end of the plate ss applied to the holly oi the we.

In practice l: employ plate A of steel, or other tough metal, served. in its length to conform to the ouivstuiieof the hotly of the shoe and also curved. tisnsversely along one side to conform to the stove-lute oi the lsnge of the shoe, illustrated at F. In order to secure the required strength and pirevent damage or in iuty to the lug as the shoe is Worn down in service, 1 form two transverse slots ll across the'tresd portion oi the plate andnear the o; its? thereof, these slots ex tending into the curved portion F oithe plate, oninstes-zlol slotting the plate it may be slit-ted. 'The metal strip or strep E 1 ing between these slits o1" slots is then force u wzirtlly, as closely illustrated in Fig. l of t e drawing, to the l height for forming the key-lug; or ing the east motel thereof, 0.

integi'sl i other end with ti stl "iortion $2,-

J the top wallof the hey-way D, the cast meta in "further description or illustration that the be understood that all danger of its becoming worn, damaged .or destroyed in the event of the shoe being worn down to and into the back is also provided with the openings B, bothin the tread portion A and curved flange Fi s. 7 S and 9 wherein it .is shown as oro- 7 7 I lfroinjthe flange, as ilhistrated in Fig; 5 having approximately the same height thereof,

' entirely around the strip E, the latter thus forniing a rei-n orce for the cast metal lug I? or again, I omit flowing the cast iron under or above the wrought metal strip,

'chor said back to the body C of the shoe.

. brake head rests.

*A, the metal between saidslot and end of the 0 enin and reinforcin said hook as illus- 3 PW I zstrip may beextended straight across or it may be lowered or curved, as illustrated in Fig. Gin order'that the body metal C may flow over the same to assist in securely an ehoring it in place, the strip E itself forming of the body C forming the sides and bottom thereof.

" It will of course be understood without metal of the body C may be allowed to flow which in itselfis sulflciently strong to he the head and shoe together.

l 1 l By means of this construction of lug it'will i steel back, is obviated.-" Furthermore, the shoe is provided at its middle portion wit-h a free vent'age, and withlittle or'no danger of blow .holes being caused by burning the wrought iron lug, which has heretofore been F, in orderto allow the cast metal of the body to flow-through the same and securely an As'is well known, some shoes, particularly in those used on the driver wheels otengines or lOOOInOUfGS, the central key-lug is onntmeans of a bolt, and the opposite end pro- Vided with a book, under which latter the In such instance, I prefer to form the end of the plate as illustrated in vided with the slot (:r extending from about 5 thetop of the flange l to within a short distance of the outer edge of the tread portion plate being struck upwardly in order to form the hook H, as illustrated in Fig. 8, the cast metal of the body C flowing up through the trated at c (Fig. 9). If desired, an opening I 0 may also be formed in the end of the plate 1 to allow the cast metal to flow up through the same, as illustrated at c (Fig. 9), in order 1 to assist in anchoring the back to the body attaching flange and tread portions,

sa ness and reinforce the rear side of said hook. Or

if desired, in those instances wherein the atend stops, in all of which instances the" strip forms an integral part of the steel back and reinforces either the he -lug or end stops and preserves the integrity etween'the back and been comp etely worn away.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. A back for a brake shoe formed with a flange and tread portions, and a reinforcing strip formed artially from each, substantially as described. f

2. A back for a brake shoe formed'with a flange and'tread portions, and a reinforcing strip struck up from the metal of-saidflange and tread portions, substantially as described.

3.1A back for a brake shoe formed with'a flange and tread portions, and a reinforcin strip, one end of said strip bein connected with said flange and the other wit said tread portion, substantially as described.

' 4. A back for a brake shoe formed with a rein orcing strip, one end being integral with said flange and the other with said tread portion, substantially as described.

5. A back for a brake shoe formed with a flange and tread portions, and a key-lu formed partly of the metal of said flange an partly of the tread portion, substantially as ted, one end of the. shoe being secured by 5 described.

6. A back for a'brake shoe formed with a f flange and tread portions, and an integral key-lug of approximately the height of said flange, substantially as described.

7. A back fora brake shoe formed with a flange and tread portions, and an integral lug lorined partly of the metal of said flange and partly of the metal of said tread'portion, and having approximately the height of said flange portion, substantially as described.

Signed at Chicago, in the county of Cook, and State of Illinois, this 12th day of July A. l). i907. I

v IL IAM E. Dnvon.

\Vitnesses:

CHARLES l WEIL, URBAN MULLIGAN.

and an integral oint until the body metal has 

